#define _CRT_SECURE_NO_WARNINGS 1

#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include <ctype.h>

//malloc calloc realloc free
//perror static typedef extern
//strstr strtok strcpy strcmp strcat strerror
//memset memcpy memmove memcpy
//islower isupper 

int main()
{
	int a = 10000;

	FILE* pf = fopen("fufu.txt", "wb");
	fwrite(&a, 4, 1, pf);
	fclose(pf);
	pf = NULL;

	return 0;
}